Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ea692996b70470…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 14:18:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 49b22d82f3103196d90263329093bce0 SHA-1: dbd2009687150550b31b91c90ca3f4c821b12784 SHA-256: 38ea692996b7047011b5ac8e5bcc1aa5ec585c8cb38fa5bc5730d45b60b537c8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/free-robux-with-no-verification-2021-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/list-of-roblox-hackers_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-hack-real-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303F 22296 bytes
SHA-256: 33206b03dfd4226754019fbe32bff8fb03034b69fc3199d2feb6b325a7232c87
font_01_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 19840 bytes
SHA-256: bf7c23b41782422fa131bc9f6708f01af46f806364d2ae517c2179326a085b42

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